He and Delbrück not only agreed to join forces then and there over dinner, but like new lovers in the throes of new passion, immediately travelled to New York on New Year’s Day 1941 for a ‘forty-eight-hour bout of experimentation’ in Luria’s lab. Using dishes of bacterial viruses as their biological looking glass, the pair of immigrant phageophiles began to seek answers to some of the most intractable questions of the century.